Optoma PMG+ projection screens are popular because they are inexpensive and easy to operate. Optoma Manual Screens offer several outstanding features. Optoma PMG+ Manual Screens feature Speed Reduction-Retraction. Simply pull down lightly to release the locking mechanism, let go and the screen will slowly return to the casing. Pull down the screen and hold for 3 seconds, then release. The screen will stay at the desired position. Optoma's matte white fabric is composed of 4 different layers, including a sheet of weaved fibre-glass which helps stop static electricity and most importantly prevent wrinkles and waves. The screen fabric consists of a special material that helps prevent the loss of light, making it compatible with virtually every projector. The fabrics are designed to be fire, water, and mould resistant and can be cleaned if required. The outside surface of the matte white screen has microdots that are made with PVC technology. This surface helps with creating the best possible reflection, whilst advances in screen technology help keep our matte white screen flat and retain its shape and effectiveness over longer periods of time.